1 files changed, 80 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_pm.c b/drivers/gpu/drm/i915/pxp/intel_pxp_pm.c
new file mode 100644
index 000000000000..6dfd24918953
--- /dev/null
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_pm.c
@@ -0,0 +1,80 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright(c) 2020 Intel Corporation.
+ */
+
+#include "i915_drv.h"
+
+#include "intel_pxp.h"
+#include "intel_pxp_irq.h"
+#include "intel_pxp_pm.h"
+#include "intel_pxp_session.h"
+#include "intel_pxp_types.h"
+
+void intel_pxp_suspend_prepare(struct intel_pxp *pxp)
+{
+	if (!intel_pxp_is_enabled(pxp))
+		return;
+
+	intel_pxp_end(pxp);
+
+	intel_pxp_invalidate(pxp);
+}
+
+void intel_pxp_suspend(struct intel_pxp *pxp)
+{
+	intel_wakeref_t wakeref;
+
+	if (!intel_pxp_is_enabled(pxp))
+		return;
+
+	with_intel_runtime_pm(&pxp->ctrl_gt->i915->runtime_pm, wakeref) {
+		intel_pxp_fini_hw(pxp);
+		pxp->hw_state_invalidated = false;
+	}
+}
+
+static void _pxp_resume(struct intel_pxp *pxp, bool take_wakeref)
+{
+	intel_wakeref_t wakeref;
+
+	if (!intel_pxp_is_enabled(pxp))
+		return;
+
+	/*
+	 * The PXP component gets automatically unbound when we go into S3 and
+	 * re-bound after we come out, so in that scenario we can defer the
+	 * hw init to the bind call.
+	 * NOTE: GSC-CS backend doesn't rely on components.
+	 */
+	if (!HAS_ENGINE(pxp->ctrl_gt, GSC0) && !pxp->pxp_component)
+		return;
+
+	if (take_wakeref)
+		wakeref = intel_runtime_pm_get(&pxp->ctrl_gt->i915->runtime_pm);
+	intel_pxp_init_hw(pxp);
+	if (take_wakeref)
+		intel_runtime_pm_put(&pxp->ctrl_gt->i915->runtime_pm, wakeref);
+}
+
+void intel_pxp_resume_complete(struct intel_pxp *pxp)
+{
+	_pxp_resume(pxp, true);
+}
+
+void intel_pxp_runtime_resume(struct intel_pxp *pxp)
+{
+	_pxp_resume(pxp, false);
+}
+
+void intel_pxp_runtime_suspend(struct intel_pxp *pxp)
+{
+	if (!intel_pxp_is_enabled(pxp))
+		return;
+
+	pxp->arb_is_valid = false;
+
+	intel_pxp_fini_hw(pxp);
+
+	pxp->hw_state_invalidated = false;
+}